There was a fair bit of "Mix-n'-Match in service.

Is it numbered on the bayonet boss or is it "scrubbed" or "blank" original? If it is not numbered to the body, it will have been fitted after it left the service system. Any Jovino or other "bulk" importers codes/ markings anywhere?

Major parts made at Lithgow are usually adorned with an assortment of stamps that will indicate this origin.

The two holes in the "ears"; (correctly called "wings")? Do they look like "factory-machined" and correctly "blacked", or a little more "agricultural". At the Australianicon factories, the sight protector wings were machined out from August 1944. This was primarily done so that the front sight blade could be adjusted without removing the nosecap. They were also modified at unit and higher-level workshops as per official instructions, as late as the early 1960s. By that stage, apart from the HT sniper units, only Cadet services were using No. 1 rifles.